"The word 'ether' has extremely negative connotations in theoretical physics because of its past association with opposition to relativity. This is unfortunate because, stripped of these connotations, it rather nicely captures the way most physicists actually think about the vacuum. . . . Relativity actually says nothing about the existence or nonexistence of matter pervading the universe, only that any such matter must have relativistic symmetry. [..] It turns out that such matter exists. About the time relativity was becoming accepted, studies of radioactivity began showing that the empty vacuum of space had spectroscopic structure similar to that of ordinary quantum solids and fluids. Subsequent studies with large particle accelerators have now led us to understand that space is more like a piece of window glass than ideal Newtonian emptiness. It is filled with 'stuff' that is normally transparent but can be made visible by hitting it sufficiently hard to knock out a part. The modern concept of the vacuum of space, confirmed every day by experiment, is a relativistic ether. But we do not call it this because it is taboo." - Robert B. Laughlin, Nobel Laureate in Physics, endowed chair in physics, Stanford University
"any particle, even isolated, has to be imagined as in continuous “energetic contact” with a hidden medium ... If a hidden sub-quantum medium is assumed, knowledge of its nature would seem desirable. It certainly is of quite complex character. It could not serve as a universal reference medium, as this would be contrary to relativity theory." - Louis de Broglie, Nobel Laureate in Physics
"According to the general theory of relativity space without ether is unthinkable; for in such space there not only would be no propagation of light, but also no possibility of existence for standards of space and time (measuring-rods and clocks), nor therefore any space-time intervals in the physical sense." - Albert Einstein, Nobel Laureate in Physics
The relativistic ether referred to by Laughlin is the hidden sub-quantum medium referred to by de Broglie is the ether which propagates light referred to by Einstein.
Lawrence M. Krauss (http://en.wikipedia.org/wiki/Lawrence_M._Krauss) says, "If you removed all of the particles, all of the radiation, absolutely everything from space and all that remained was nothing that nothing would weigh something."
What weighs something has mass. If everything is removed then all that is left is the aether. Meaning, aether has mass.
"a "field" in physics may be envisioned as if space were filled with interconnected vibrating balls and springs, and the strength of the field can be visualized as the displacement of a ball from its rest position"
A 'field' in physics is the aether and the strength of the field is the displacement of the aether from its relative rest position.
Each of the plates in the Casimir effect displace the aether. The displaced aether which exists between the plates is pushing back toward each of the plates which causes the force associated with the aether displaced by each of the plates which exists between the plates to offset. This aether is more at relativistic rest than the aether which is displaced by the plates which encompasses the plates. The reduced force associated with aether which exists between the plates along with the displaced aether which encompasses the plates which is pushing back and exerting inward pressure toward the plates causes the plates to be forced together.
What occurs physically in nature in the Casimir effect is the same phenomenon as gravity.
There is no such thing as non-baryonic dark matter anchored to matter. Aether has mass. Aether physically occupies three dimensional space. Aether is physically displaced by matter.
The aether which exists between the Earth and the Moon is displaced by both the Earth and the Moon and is pushing back toward the Earth and toward the Moon. This displaced aether offsets and cancels each other out to some degree. This aether is more at relativistic rest than the displaced aether which encompasses the Earth and the Moon.
The aether which encompasses the Earth and the Moon is able to exert more pressure on the solid matter Earth than it can the liquid oceans. This, along with the molecular bonds associated with the solid matter the Earth consists of, causes the solid matter Earth to be pushed closer to the Moon than the ocean water opposite the Moon. This causes the ocean to 'rise' opposite the Moon. The aether between the Earth and Moon exerts less pressure on the ocean water than it can the solid matter Earth. This, along with the the molecular bonds associated with the solid matter the Earth consists of, causes the ocean to rise between the Earth and Moon.
In terms of relativity, spacetime is less curved between the Earth and the Moon and more curved encompassing the Earth and the Moon.
In terms of what occurs physically in nature, the aether is more at relativistic rest between the Earth and the Moon and more displaced encompassing the Earth and the Moon.
"Think of waves on the surface of water. Here we can describe two entirely different things. Either we may observe how the undulatory surface forming the boundary between water and air alters in the course of time; or else-with the help of small floats, for instance - we can observe how the position of the separate particles of water alters in the course of time. If the existence of such floats for tracking the motion of the particles of a fluid were a fundamental impossibility in physics - if, in fact nothing else whatever were observable than the shape of the space occupied by the water as it varies in time, we should have no ground for the assumption that water consists of movable particles. But all the same we could characterise it as a medium."
if, in fact nothing else whatever were observable than the shape of the space occupied by the aether as it varies in time, we should have no ground for the assumption that aether consists of movable particles. But all the same we could characterise it as a medium having mass which is displaced by the particles of matter which exist in it and move through it.
The following image is theorized to represent the 'dark matter halos' which are anchored to the galaxy clusters. The 'dark matter halos' are theorized to travel with the galaxy clusters. This is incorrect.
Think of the following image as being a piece of window glass where the space surrounding the galaxies represents the state of displacement of the aether. The aether surrounding the galaxies does not travel with the galaxies. The galaxies are moving through and displacing the aether. Think of a bunch of submarines moving through the ocean. The submarines move through and displace the water. Galaxies move through and physically displace the aether.
The halos surrounding the galaxy clusters is the state of displacement of the aether. The aether displaced by the galaxy clusters, pushing back and exerting inward pressure toward the galaxy clusters is gravity.
The state of displacement of the aether is gravity.